2018 Elements, Atoms And Bonding Rho Pre-mid Term Quiz

10 Questions | By Rhaveno | Last updated: Dec 12, 2018 | Total Attempts: 78

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2018 Elements, Atoms And Bonding Rho Pre-mid Term Quiz - Quiz

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1.

A compound is different from an element because a compound is:
- A.
  
  Made of two or more elements chemically combined.
- B.
  
  The building block of all matter.
- C.
  
  A mixture of elements.
- D.
  
  A pure substance.
2.

This scientist discovered another particle in the nucleus of an atoms. The discovery completed the modern atomic model. This particle was hard to detect because it does not have an electrical charge even though it has nearly the same mass as a proton. Because the particle had no electrical charge it was called a neutron.
- A.
  
  Chadwick
- B.
  
  Bohr
- C.
  
  Thomson
- D.
  
  Rutherford
- E.
  
  Dalton
3.

Elements are called building blocks of matter because:
- A.
  
  All matter is composed of one element or a combination of two of more elements.
- B.
  
  All elements are made of molecules.
- C.
  
  All matter is made of hydrogen.
- D.
  
  All matter is composed of two or more elements in a specific ratio.
4.

In 430 b.c. ancient Greece, a philosopher named Democritus proposed the idea that matter is made up of very small pieces that are "uncuttable" into smaller parts and still be that element. It took 2000 years until Democritus' idea was accepted. These small "uncuttable" pieces are called:
- A.
  
  Atoms
- B.
  
  Molecules
- C.
  
  Ions
- D.
  
  Elements
5.

All the atoms of a single element have the same number of protons. Different elements have different number of _______________
- A.
  
  Protons
- B.
  
  Neutrons
- C.
  
  Electrons
- D.
  
  Nucleus
6.

Which of the following is not a mixture?
- A.
  
  Oxygen
- B.
  
  Air
- C.
  
  Soil
- D.
  
  Orange juice
7.

Identify which statement is NOT part of John Dalton's atomic theory:
- A.
  
  Atoms have no overall electrical charge because each atom has the same number of electrons as protons.
- B.
  
  All atoms of the same element are exactly alike and have the same mass. Atoms of different elements are different and have different masses.
- C.
  
  An atom of one element cannot be changed into an atom of a different element. Atoms cannot be created or destroyed in any chemical change, only rearranged.
- D.
  
  Every compound is composed of atoms of different elements combined in a specific ratio.
- E.
  
  All elements are composed of atoms that cannot be divided.
8.

John Dalton's, with only a few changes, is still accepted today. John Dalton's atomic model could be described:
- A.
  
  Smooth and solid, like a lacrosse ball, that cannot be broken down into smaller pieces.
- B.
  
  Like a muffin with positive charges and electrons scattered in spheres around the positive charges.
- C.
  
  Like planets orbiting the sun, or the layers of an onion, electrons orbit the nucleus.
- D.
  
  Like a cloud, with expanding energy levels.
9.

A scientific theory
- A.
  
  Is a well-tested idea that EXPLAINS and connects a wide range of observations. It explains how nature works.
- B.
  
  Is a statement that describes nature's behavior.
- C.
  
  Is a method of inquiry used to test an idea.
- D.
  
  Option 4
10.

Rutherford's Gold Foil Experiment demonstrated that
- A.
  
  Electrons move around a small positively charged nucleus in the center of the atom.
- B.
  
  The electrons are in orbit like planets around the sun.
- C.
  
  Electrons are in a cloud that floats around the nucleus.
- D.
  
  Electrons have only specific amounts of energy related to the orbits in which they move.